1998 Porsche Boxster, Almost A Classic Car on 2040-cars

Auto blog

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Lexus leads J.D. Power's Vehicle Dependability Study for 2021

J.D. Power's latest Vehicle Dependability Study is out, and, not surprisingly, Lexus sits at the top for the ninth time in the last 10 years. Right behind Lexus is Porsche, followed by Kia, which is the highest-ranked mass-market brand in the study. Genesis, last year's top-ranked brand (in its first year included in the results), fell from first to eighth, though the G80 sedan did earn an award in its midsize luxury segment. The Porsche 911 was called out as the Most Dependable Model by J.D. Power for the second time in the last three years. The vehicles being studied are from the 2018 model year, which means owners have had three years to get to know their cars and trucks. It's notable that this year's study shows a marked improvement in overall vehicle dependability as tracked by J.D. Power. The overall level of problems, scored by the number of problems per 100 vehicles (PP100), declined by 10% compared to last year.  "The study results validate what we have known for some time," said Dave Sargent, vice president of global automotive at J.D. Power. "Automakers are making increasingly dependable vehicles — but there are still some problem areas that need to be addressed and some warning signs on the horizon." Tesla makes its inaugural appearance on the Dependability Study, though its score of 176 PP100 isn't official. Tesla is the only automaker that has chosen not to grant J.D. Power permission to survey its owners in all 50 states. As we've pointed out in the past, the Vehicle Dependability Study includes eight major vehicle categories grouped by J.D. Power as follows: audio/communication/entertainment/navigation (ACEN); engine/transmission; exterior; interior; features/controls/displays (FCD); driving experience; heating, ventilation and air conditioning; and seats. All issues reported by owners are all tracked equally, which means a problematic phone pairing procedure dings an automaker's rating the same as a blown engine or transmission. And in fact, the ACEN category has more reported problems than any other, which means the majority of problems reported don't lead to a vehicle that leaves its owner stranded. Green Land Rover Lexus Porsche Car Buying JD Power dependability reliability

Submit your questions for Autoblog Podcast #344 LIVE!

We're set to record Autoblog Podcast #344 tonight, joined by Doug DeMuro, author of Plays With Cars, formerly of Porsche Cars North America, and all-around swell guy. You can drop us your questions and comments via our Q&A module below, and we'll give them extra-diligent attention. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #344
BRZ STI?